Remote control switch circuit

ABSTRACT

A remote control switch circuit for switching on and off an associated load with a remote control relay operated by one of a plurality of remote control switches which is actuated independently of others. The circuit comprises a series circuit of a remote load section including the remote control relay connected to the load and normally closed and normally opened contacts connected in series through a pair of reversely connected diodes to the relay and a first operating switch section including the remote control switch for initiating and interrupting current fed to a polar relay and normally closed and normally opened contacts connected in series through a pair of reversly connected diodes to the switch, and an AC source providing source voltage to said series circuit. Other operating switch section or sections will be connected to said first section in parallel relation thereto.

Hisano -4 1 Feb. 26, 1974 REMOTE CONTROL SWITCH CIRCUIT [75] lnventorzTsuyoshi l-lisano, Tsu, Japan [73] Assignee: Matsushita Electric Works,Ltd.,

Osaka, Japan 22 Filed: Sept. 27, 1972 [21 Appl. No.: 292,604

[30] Foreign Application Priority Data [58] Field of Search... 317/136,137, 150, 157, 139, 317/140; 340/147 R, 147 TN, 176; 307/114, 140, 143,127, 138,146

[56] References Cited UNITED STATES PATENTS 3,273,024 9/1966 Sherman317/157 3,201,754 8/1965 Reiner et a1. 317/150 FOREIGN PATENTS'ORAPPLICATIONS Japan 317/150 Primary Examiner-J. D. Miller AssistantExaminer-Harry E. Moose, Jr.

Attorney, Agent, or Firm-Wolfe, Hubbard, Leydig, Voit, & Osann, Ltd.

[57] ABSTRACT A remote control switch circuit for switching on and offan associated load with a remote control relay operated by one of aplurality of remote control switches which is actuated independently ofothers. The circuit comprises a series circuit of a remote load sectionincluding the remote control relay connected to the load and normallyclosed and normally opened contacts connected in series through a pairof reversely connected diodes to the relay and a first operating switchsection including the remote control switch for initiating andinterrupting current fed to a polar relay and normally closed andnormally opened contacts connected in series through a pair of reverslyconnected diodes to the switch, and an AC source providing sourcevoltage to said series circuit. Other operating switch section orsections will be connected to said first section in parallel relationthereto.

2 Claims, 18 Drawing Figures PAIEN IEB FEB 2 6 i974 SHEEI 5 OF 6 mm n6QM um EATENTEDFEBZB mm 3.794' 888 sum 8 or e 1 REMOTE CONTROL SWITCHCIRCUIT This invention relates to a remote control switch circuitwherein a remote control relay is independently operated by either oneof remote control switches provided in several places to switch on andoff a load.

Conventional remote control switchs of this kind have defects that theyare of a very complicated formation, that, when the remote control relaycircuits increase, the wirings will be complicated and that, when thenumber of indicating lamps increases, the life of the auxiliary contactof the remote control relay will reduce since the lamp current will flowthrough the auxiliary contact. The present invention has been suggestedto remove these defects.

Principal object of the present invention is to provide a remote controlswitch circuit wherein loads can be steppedly remote-controlled by asimple combination of circuit elements.

Another object of the present invention is to provide a remote controlswitch circuit wherein, even if the number of indicating lampsincreases, the life of the auxiliary contact of the relay will not bereduced.

A further object of the present invention is to provide a remote controlswitch circuit wherein the wiring can be simplified. v I

The present invention shall be explained in the fol lowing withreference to accompanying drawings, in which:

FIG. I shows an embodiment of the remote control switch circuit of thepresent invention.

FIGS. 2A-2G are time charts for explaining the operation of the circuitof FIG. 1.

FIG. 3 is a block diagram showing a wiring of a plurality of thecircuitry systems in FIG. 1.

FIG. 4 shows a further improved embodiment of the remote control switchcircuit of the present invention.

FIGS. 5A-5G are time charts for explaining the operation of the circuitof FIG. 4.

FIG. 6 is a block diagram showing a wiring relation in the case ofwiring a plurality of the circuitry systems in FIG. 4.

In FIG. I showing a remote control switch circuit of the presentinvention, Ac is an alternating current source, A, is a remote controlrelay circuit, that is, a re mote load section and B, to B remotecontrol switch sections or operating switch sections. Referring furtherto the formation of the remote control relay circuit A,, Ry is a firstpolar relay coil, r, and r, are contacts to be set ON and OFF by theoperation of the relay coil Ry, D and D' are diodes and r,,, r, and rare contacts forming the contact r,. Referring next to the formations ofremote control switch section B,, S, is a change-over switch, S, and S,are contacts, R1, is a second polar relay for making a switchingoperation depending on the direction of the current, R1, is its contact,la and lb are contacts, D, and D, are diodes and L, is an indicatinglamp. The polar relay R1, in the present instance is so formed that,when the current flows in the direction indicated by the arrow a, thecontact Ia will close and, when the current flows in the directionindicated by the arrow b, the contact lb will close. The formations ofthe respective sections B and B are also the same as of the section B,.

In this circuit, when any of the remote control switch sections B, to Bis operated, the remote control relay Ry will be controlled and thecontact r will be set ON or OFF so that the load will be switched on orswitched off.

Now, the operation of the circuit of the present invention shall beexplained in detail. In the state shown in FIG. 1, the remote controlrelay Ry is not in operatron.

If, for example, the switch S, is operated so that the contact S,,, willbe ON and S,, will be OFF (see FIG. 2A), aclosed circuit of Ac r n, D RyS b, Ac will be formed and the contact r of the relay Ry will be set ON(see FIG. 2G). Then, if the remote control relay Ry operates, thecontact r, will be switched so that r will be ON and r,, will be OFF(see FIG. 2C) and a current will flow through the diodes D, and D to.light the indicating lamp L,.

Next, if the switch S, is operated so that the contact 8,, will be OFFand S Will be ON, a current will flow through a closed circuit of Ac R1,S,,,'- Ry D r, r Ac from the current source Ac and, as the direction ofthis current is the direction indicated by the arrow a, the contact ofthe relay RI, will be switched so that the contact la will be ON and 112will be OFF (see FIG. 2D). Thus the next operation is prepared.

Then, if the switch S, is operated so that the contact 8,, side will beagain ON, a current will flow through a circuit of Ac D, la S, Ry D r,,r,. Ac from the current source Ac, the remote control relay Ry willreverse as in FIG. 2B, the contact r,, will be OFF, n, will be ON, nocurrent will flow through the remote control relay Ry and thus nocurrent will flow through the indicating lamp L, which will go out asshown in FIG. 2F. Then, if the switch S, is operated so that the contact8,, side will be ON, a current in the direction indicated by the arrow12 will flow through the polar relay RI, and the contact of the polarrelay R1, will be switched over to the b side.

' Such operations as in the above are made. In this system, as thecurrent indicating lamps L, to L, are respectively connected in serieswith the remote control relay Ry, if many indicating lamps areconnected, a large current will flow through the remote control relay Ryand errors will be likely to be caused. Therefore, it is necessary thatonly such number not interfering with the operation of the remotecontrol relay Ry as, for example, two lamps L, and L of the remotecontrol switch sections B, and B should be connected in series but thethird lamp L should be connected so as not to be in series with theremote control relay Ry. Therefore, the lamp L is connected with theconnecting point of the contact r of the remote control relay Ry and thediode D by using a lead wire 1. However, there are defects that, forexample, as shown in FIG. 3, in the case of the three circuits of theremote control relays A, to A the number of wirings will increase by thenumber of the remote control relay circuits, therefore, the connectionof the thirdswitch section B,, will be complicated, the current flowingthrough the lamp will flow to the auxiliary contact of the remotecontrol relay Ry and therefor the life of the auxiliary contact willreduce. The circuit system in FIG. 4 has been suggested to improve thesedefects.

In FIG. 4 showing a further improved embodiment of the presentinvention, A, is a remote control circuit, and B, to 8,, are operatingswitch sections. The relay 3 Ry, polar relays R1 to R1 switches S, to Slamps L to L diodes and relay contacts used to form A, and B to B arerepresented respectively by the same corresponding numerals as inFIG. 1. The feature of this circuit system is that the diodes D to D areconnected in series with the lamps L to L The diodes D and D areconnected between such number not interfering with the operation of theremote control relay Ry as, for example, two lamps L and L of the remotecontrol switch sections B and B and contacts and 2c (movable contacts ofthe polar relays R1 and R1 and the lamp L of the rest remote controlswitch section B is connected through the diode movable contact r side(one end of the current source 'Ac) of the switching auxiliary contact rof the remote control relay Ry and the movable contact 3c of theswitching contact R1 of the polar relay R1 The other formation is thesame as in the case of FIG. 1 and the operation is also exactly the sameas in FIG. 1. FIG. 5 shows a time chart of the present invention.

In the present invention, as described above, as the current of theindicating lamps flowing through the auxiliary contact of the remotecontrol relay .Ry is not larger than for two lamps, even if the numberof lamps increases, the life of the auxiliary contact will not bereduced. Further, shown in FIG.. 6, as the electric wire correspondingto l in FIG. 3 can be made only a single electricwire lo, the thirdswitch section 8;; will be also of the same number of wirings as of thefirst and second switch sections B, and B and the wirings can besimplified.

What l claim is:

l. A remote control switch circuit comprising the combination of a. aremote load section comprising 1. a first polarized relay coil foroperating the contacts of a load, 2. a pair of oppositely facing diodesconnected in D between the.

parallel, with each other with one end of the parallel diodes connectedto said coil,

3. and a switch operated by said first polarized relay coil andconnected to the other end of the parallel diodes for connectingalternate ones of said diodes in series with said coil in response toenergization of said coil by signals of alternate polarities,' V I b.and at least one operating switch section comprising 1. a secondpolarized relay coil 7 2. a second pair of oppositely facing diodesconnected in parallel with each other and with said second coil,.

3. a manually operated switch connected in series with said firstpolarized relay coil for connecting either said second coil or thesecond pair of di odes in series with said first coil,

4. a switch operated by said second polarized relay coil connectedbetween said manually operated switch and said second' pair of diodesfor connecting alternate onesof said second pair of diodes in serieswith said manually operated switch in response to energization of saidsecond coil by signals of alternate polarities,

5. and an indicating lamp connected in series with said first polarizedrelay coil and at least one of the diodes in said second pair.

c. and an a-c source connected across said remote load section and saidoperating switch section. 2. A remote control switch circuit as setforth in claim 1 which includes a plurality of said operating switchsections in at least one of which the indicating lamp is connected inseries with at least one of the diodes in said second pair and said a-c.source, and including a further diode connected in series with saidindicating lamp.

' =i =l l

1. A remote control switch circuit comprising the combination of a. aremote load section comprising
 1. a first polarized relay coil foroperating the contacts of a load,
 2. a pair of oppositely facing diodesconnected in parallel with each other with one end of the paralleldiodes connected to said coil,
 3. and a switch operated by said firstpolarized relay coil and connected to the other end of the paralleldiodes for connecting alternate ones of said diodes in series with saidcoil in response to energization of said coil by signals of alternatepolarities, b. and at least one operating switch section comprising
 1. asecond polarized relay coil,
 2. a second pair of oppositely facingdiodes connected in parallel with each other and with said second coil,3. a manually operated switch connected in series with said firstpolarized relay coil for connecting either said secOnd coil or thesecond pair of diodes in series with said first coil,
 4. a switchoperated by said second polarized relay coil connected between saidmanually operated switch and said second pair of diodes for connectingalternate ones of said second pair of diodes in series with saidmanually operated switch in response to energization of said second coilby signals of alternate polarities,
 5. and an indicating lamp connectedin series with said first polarized relay coil and at least one of thediodes in said second pair. c. and an a-c source connected across saidremote load section and said operating switch section.
 2. a pair ofoppositely facing diodes connected in parallel with each other with oneend of the parallel diodes connected to said coil,
 2. a second pair ofoppositely facing diodes connected in parallel with each other and withsaid second coil,
 2. A remote control switch circuit as set forth inclaim 1 which includes a plurality of said operating switch sections inat least one of which the indicating lamp is connected in series with atleast one of the diodes in said second pair and said a-c. source, andincluding a further diode connected in series with said indicating lamp.3. a manually operated switch connected in series with said firstpolarized relay coil for connecting either said secOnd coil or thesecond pair of diodes in series with said first coil,
 3. and a switchoperated by said first polarized relay coil and connected to the otherend of the parallel diodes for connecting alternate ones of said diodesin series with said coil in response to energization of said coil bysignals of alternate polarities, b. and at least one operating switchsection comprising
 4. a switch operated by said second polarized relaycoil connected between said manually operated switch and said secondpair of diodes for connecting alternate ones of said second pair ofdiodes in series with said manually operated switch in response toenergization of said second coil by signals of alternate polarities, 5.and an indicating lamp connected in series with said first polarizedrelay coil and at least one of the diodes in said second pair. c. and ana-c source connected across said remote load section and said operatingswitch section.